Pentalith (2005)

Two or 4 players gather to build a monolithic tower by placing a set of unique blocks on a foundation. The first player to fail to place their block, or to think they can't place their block loses. This game features head to head play, and team play in partnerships of 2. There are 2 sets of 24 blocks made of reclaimed wood, a base with a 5×5 grid, and two bags for each player's blocks. The idea in placing a block is to set yourself up with as many future options as possible while trying to eliminate placement options for the opponent. This game is an excellent tool for teaching small motor skills and spatial recognition. It can be played by children age 6 and up. It's one of those games that take 5 minutes to learn, and a lifetime to master. It offers great replayability as each game is short, and each tower you build is unique.